ci: Try to skip AppVeyor branch builds other than master
Even though I've configured AppVeyor to build only from the master
branch in the web interface, it keeps building both for the branch _and_
for the PR when I open a new PR. This is not useful at the moment and
only takes longer to validate the PR. Let's see if we can make it behave
by updating the local config file.
Signed-off-by: Quentin Monnet <quentin@isovalent.com>
Quentin Monnet